Error Log Files created. See https://www.dokuwiki.org/devel:debugging?s[]=debug
From the manual Enable debugging
When config option allowdebug is enabled you can:
Get page and user info
Appending ?do=check or &do=check to URL triggers the action mode check that provides some information about the users permissions and the DokuWiki setup.
SEE this page https://www.dokuwiki.org/config:allowdebug
From that page
Configuration Setting: allowdebug
To make it simpler to answer support requests, DokuWiki can output a huge list of debug strings when requested.
For that, enable the option and append &do=debug or ?do=debug, to the URL, as in http://example.com/dokuwiki/doku.php?id=playground&do=debug.
This is useful to troubleshoot all kind of configuration problems when setting up the Wiki for the first time. But it reveals a lot of info about the server DokuWiki is running on as well.
To be on the safe side you should disable this option and thus disabling the debug function right after your Wiki was set up successfully.